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Biology
10th -
University
MCQ Botany, S Malar Vizhi GHSS Chenbai, Kanyakumari Dt.
15 questions
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- 1. Multiple Choice
The first stable compound of C3 cycle, C4 cycle and kreb’s cycle are respectively1. The first stable compound of C3 cycle, C4 cycle and kreb’s cycle are respectively
A) OAA, 3-PGA, oxalosuccinic acid
B) 3 – PGAL, OAA, citric acid
B) 3 – PGA, OAA, citric acid
B) Citric acid, 3 – PGA, OAA
- 2. Multiple Choice
Difference between osmotic pressure and turgor pressure is
A) Diffusion Pressure Deficit (DPD)
B) Transpiration pull
C) Osmotic potential
D) Solute potential
- 3. Multiple Choice
Path of water movement from soil to xylem is
A) Metaxylem – Protoxylem – Cortex –Soil - Root hair
B) Cortex – Roothair - Endodermis - Pericycle - Protoxylem - Metaxylem
C) Soil - Root hair – Cortex – Endodermis – Pericycle – Protoxylem – Metaxylem
D) Pericycle - Soil - Root hair – Cortex – Endodermis – Protoxylem – Metaxylem
- 4. Multiple Choice
Stomata opens when guard cells swell due to
A) Decreased water potential
B) Increased water potential
C) Endosmosis by efflux of K+ ions
D) Endosmosis by influx of K+ ions
- 5. Multiple Choice
Stomatal opening is influenced by
A) N2 concentration, CO2 concentration and light
B) CO2 concentration, temperature and light
C) N2 concentration, light and Temperature
D) CO2 concentration, N2 concentration and temperature
- 6. Multiple Choice
Find the correct equation for plasmolysis
A) DPD= OP+TP
B) DPD = -TP
B) DPD = -TP
D) DPD = OP-TP
- 7. Multiple Choice
Which of the following is correct for photosynthesis
A) Biological oxidation process
B) Photochemical catabolic process
C) Photo-oxidative metabolism
D) Photochemical, oxidative and reductive, anabolic process.
- 8. Multiple Choice
Chloroplast contains maximum quantity of
A) Pyruvic carboxylase
B) Hexokinase
C) RuBP carboxylase
D) None of the above
- 9. Multiple Choice
Bacteriochlorophyll differs from chlorophyll ‘a’ in having
A) One pyrrole ring with one hydrogen
B) One pyrrole ring with two hydrogen
C) One pyrrole ring with three hydrogen
D) One pyrrole ring with four hydrogen
- 10. Multiple Choice
When a green plant is exposed to the light on only one side, it bend towards the source of light as it grows. This shows
A) Green plants need light to perform photosynthesis
B) Green plants need light because they are phototropic
C) Light stimulates plant cells on the lighted side to grow faster
D) Auxin accumulates on the shaded side, stimulating greater cell elongation there
- 11. Multiple Choice
A few normal seedlings of peas were kept in a dark room. After a few days they were found to have become white, like albinos. Which of the following terms will you use to describe it?
A) Mutated
B) Embolised
C) Etiolated
D) Defoliated
- 12. Multiple Choice
13. Which one of the following is correctly matched?
A) Passive transport of nutrients-ATP
B) Apoplast – Plasmodesmata
C) Potassium _ Readily mobilize
D) Bakane of rice seedlings – F Skoog
- 13. Multiple Choice
Coiling of garden pea tendrils around any support is an example of
A) Thigmonasty
B) Thigmotaxis
C) Thermotaxis
D) Thigmotropism
- 14. Multiple Choice
The acid which is derived from carotenoid is
A) Abscisic acid
B) Indole-3-acetic acid
C) Gibberellic acid
D) Indole-butyric acid
- 15. Multiple Choice
How does pruning help in making the hedge dense?
A) It induces the differentiation of new shoots from the rootstock
B) It frees axillary buds from apical dominance
C) The apical shoot grows faster after pruning
D) It releases plant growth hormones
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